| EIEagle Iron Works | Des Moines | — | ◇ UNVERIFIED |
| HHHampton Hydraulics Llc-div of Seabee | Hampton | — | ◇ UNVERIFIED |
| ITIpsco Tubulars Incorporated | Camanche | — | ◇ UNVERIFIED |
| KSKatelman Steel Fabrication INC | Council Bluffs | — | ◇ UNVERIFIED |
| MCMax Cast | Kalona | — | ◇ UNVERIFIED |
| MMepco | Marshalltown | — | ◇ UNVERIFIED |
| QAQuandt Auto Salvage | Carroll | — | ◇ UNVERIFIED |
| RRyerson | Marshalltown | — | ◇ UNVERIFIED |
| SFSeabee Foundry | Hampton | — | ◇ UNVERIFIED |
| SSSivyer Steel CORP | Bettendorf | — | ◇ UNVERIFIED |
| TCTwin City Holland LLC - Administrative Id # Only | Davenport | — | ◇ UNVERIFIED |
| VPViking Pump Inc-alloys Foundry | Cedar Falls | — | ◇ UNVERIFIED |
| WPWilton Precision Steel CO | Wilton | — | ◇ UNVERIFIED |
| ARAmsted Rail Griffin Wheel | Keokuk | 100–499 | ◐ LIKELY ACTIVE |
| ALAnyGlide, LLC | Rock Valley | 1–19 | ◐ LIKELY ACTIVE |
| AMATEK Metal Technologies | New Hampton | 100–499 | ◐ LIKELY ACTIVE |
| CVClow Valve Company - Metal Casting Facility | Oskaloosa | 100–499 | ◐ LIKELY ACTIVE |
| KIKcng Iowa | Cedar Falls | 20–99 | ◐ LIKELY ACTIVE |
| MMMonarch Materials Group, Inc. | Adel | 20–99 | ◐ LIKELY ACTIVE |
| PGPhoenix Global, LLC-Wilton | Wilton | 1–19 | ◐ LIKELY ACTIVE |
| SRSSAB R & D of SSAB Iowa Inc. | Muscatine | 1–19 | ◐ LIKELY ACTIVE |
| TLTdvib LLC | Boone | — | ◐ LIKELY ACTIVE |
| VPViking Pump Inc - Foundry (A Unit of IDEX Corporation) | Cedar Falls | 20–99 | ◐ LIKELY ACTIVE |
| NINorthern Iowa Die Casting, INC. | Lake Park | — | ◇ UNVERIFIED |
| ACAlcast Company Midwest Works LLC | Fairfield | — | ◇ UNVERIFIED |
| BRBolsinger Rebar INC | Cascade | — | ◇ UNVERIFIED |
| DZDee Zee Extrusion | Des Moines | — | ◇ UNVERIFIED |
| FMFerguson Mfg. CO. INC. | Spirit Lake | — | ◇ UNVERIFIED |
| GLGFrench, LLC | Arnolds Park | — | ◇ UNVERIFIED |
| GLGFrench, LLC | Arnolds Park | — | ◇ UNVERIFIED |
| ISIntertrade Steel Corporation | Cedar Rapids | — | ◇ UNVERIFIED |
| JLJoseph L. Ertl, INC. Dba Scale Models & Dyersville Die Cast | Farley | — | ◇ UNVERIFIED |
| KFKloppenborg Foundry & Fan CO | Davenport | — | ◇ UNVERIFIED |
| NANichols Aluminum Casting | Davenport | — | ◇ UNVERIFIED |
| NSNorth Star Recycling | Wilton | — | ◇ UNVERIFIED |
| RIRusselloy Iron Foundry, LLC | Coralville | — | ◇ UNVERIFIED |
| RIRyerson INC. | Eldridge | — | ◇ UNVERIFIED |
| SSSivyer Steel Castings LLC | Bettendorf | — | ◇ UNVERIFIED |
| SSSivyer Steel Corporation | Bettendorf | — | ◇ UNVERIFIED |
| SISoutheast Iowa Aluminum Foundry, INC. | Keokuk | — | ◇ UNVERIFIED |
| TSTeam Staffing Solutions, INC. | Fairfield | — | ◇ UNVERIFIED |
| TATemp Associates | Fairfield | — | ◇ UNVERIFIED |
| TIThe Iron Works LTD. | Des Moines | — | ◇ UNVERIFIED |
